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Finding the Fourth Proportional to 425,507.15, 638,262.79 and 125,993.39

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Solution

The fourth proportional to 425,507.15, 638,262.79 and 125,993.39 is: 188,990.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,507.15 : 638,262.79 = 125,993.39 : x
  2. Step 2: Convert to fraction form
    425,507.15/638,262.79 = 125,993.39/x
  3. Step 3: Cross multiply
    425,507.15x = 638,262.79 × 125,993.39
  4. Step 4: Simplify right side
    425,507.15x = 80,416,889,116.66
  5. Step 5: Solve for x
    x = 80,416,889,116.66/425,507.15
  6. Step 6: Final answer
    x = 188,990.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.